6-Channel Unbalanced to Balanced Converter


Radio Design Labs' FP-UBC6 is the perfect choice for multiple channel connectorized conversion from unbalanced to balanced audio. This module features six identical channels, making it ideally suited to converting consumer 6-channel surround sound into the professional audio format. Each input channel is unbalanced, connected through a gold-plated phono jack. Each output is balanced. All outputs are connected through XLR jacks with gold-plated pins. A gain trim potentiometer is provided for each channel.

The normal gain setting is indicated for the trimming potentiometer. This setting produces a +4 dBu balanced output for a –10 dBV unbalanced input. The gain is adjustable –5 dB to +10 dB from the normal gain. Therefore, a +4 dBu output signal is possible from input signals ranging from –20 dBV to –5 dBV.

NOTE: Radio Design Labs' PS-24AS power supply is NOT included but is required in order to power this product.  Please see the "Accessories" tab or click here for more information on the PS-24AS power supply.


  • Unbalanced to Balanced Audio Conversion
  • 6 Channel Conversion with Gain Trim
  • Connectorized Audio Converter
  • Low-Noise and Low-Distortion Conversion
  • Cabinet, Shelf or Rack Mounting
  • Convenience of RDL® FLAT-PAKs™


  • Amps per FP-UBC6: 6 identical circuits
  • Gain: -5 dB to +10 dB adjustable (relative to +4 dBu output for –10 dBV input; separate controls for each channel)
  • Input Level: -20 dBV to –5 dBV (for +4 dBu output)
  • Input Impedance: 10 kO
  • Input Configuration: Unbalanced Output Impedance: 150 O balanced, drives 600 O or 10 kO lines
  • Output Configuration: Balanced or unbalanced
  • Frequency Response: 20 Hz to 40 kHz (+/- 0.25 dB)
  • Total Harmonic Distortion: < 0.05%; typ. 0.01% (1 kHz)
  • IMD: < 0.02%
  • Output Level: +4 dBu
  • Headroom: > 18 dB (at rated output level of +4 dBu)
  • Noise: < -90 dB referred to +4 dBu (20 Hz to 20 kHz)
  • Crosstalk: Better than 80 dB (20 Hz to 20 kHz)
  • Power Requirement: GROUND-REFERENCED 24 Vdc @ 75 mA
  • Dimensions: 0.129" H x 3.25" W x 8.55" L (3.28 x 8.26 x 21.72 cm)

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